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Small intestine tissue sample
Small intestine tissue sample


Definition:

Small bowel tissue smear is a laboratory test that checks for disease in a sample of tissue from the small intestine.



How the test is performed:

A sample of tissue from the small intestine is removed during a procedure called esophagogastroduodenoscopy (EGD). For more information on this procedure, see EGD .

The sample is sent to a laboratory, where it is sliced, stained, and placed on a microscope slide for examination.



How to prepare for the test:

For information on how to prepare for the removal of tissue from your small intestine, see EGD .



How the test will feel:

For information on how it will feel to have a sample of intestinal tissue removed, see EGD .



Why the test is performed:

Your doctor may order this test if you have signs or symptoms of an infection or other disease of the small intestine. In most cases, this test is only done when a diagnosis was not able to be made from stool and blood tests.



Normal Values:

A normal result means no disease-related substances or changes were found in the sample when examined under the microscope.

However, the small intestine normally contains certain healthy bacteria and yeast. Their presence is not a sign of disease.

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.



What abnormal results mean:

An abnormal result means that certain microorganisms, such as the parasites Giardia or Strongyloides were seen in the tissue sample, or that there were changes in the structure (anatomy) of the tissue.



What the risks are:

A laboratory smear poses no risks to the patient. For risks related to obtaining a sample of intestinal tissue, see EGD .



Special considerations:

Examination of tissue by a pathologist can help in the diagnosis of certain intestinal infections.



References: Semrad CE, Powell DW. Approach to the patient with diarrhea and malabsorption. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007: chap 143.


Review Date: 11/2/2008
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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